#include<stdio.h>
int main()
{
	double a=1,b=0;
	printf("Please enter two numbers.\n");
	scanf("%lf %lf",&a,&b);
	if(b==0)
	{
		printf("b can't be 0.\n");
		return 0;
	}
	printf( "-a 		=%lf\n"
			"-b 		=%lf\n"
			"a+b 	    =%lf\n"
			"a/b 	    =%lf\n"
			"a%b 	    =invalid\n"
			"a>=b 		=%lf\n"
			"a>0&&!b!=0 =%lf\n"
			"a>0 		=%lf\n"
			"b>0 		=%lf\n"
			"a>>b%%32 	=invalid\n"
			"a&b 		=invalid\n"
			"a*=b 		=%lf\n"
			"sizeof(a) 	=%lld\n",
			-a,
			-b,
			a+b,
			a/b,
			//a%b,
			a>=b,
			a>0&&!b!=0,
			a>0,
			b>0,
			//a>>b%32,
			//a&b,
			a*=b,
			sizeof(a));
	return 0;
}
